Optical element driving module

ABSTRACT

An optical element driving mechanism is provided, including a base, a holder movably coupled to the base for holding an optical element, a casing, a frame, a driving assembly, and an adhering member. The casing has a top wall and a plurality of side walls extending from the edge of the top wall along an optical axis of the optical element, and the top wall is closer to a light-incident end than the base. The frame is disposed on the top wall and has a frame protrusion extending toward the base. The driving assembly is configured to drive the holder to move relative to the base, and an accommodating space is formed between the base, the frame and the casing. The adhering member is disposed in the accommodating space and configured to directly adhere to the base, the frame, the casing, and the driving assembly.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of application Ser. No. 16/448,816,filed on Jun. 21, 2019, which claims the benefit of provisionalApplication Ser. No. 62/688,694, filed on Jun. 22, 2018, U.S.Provisional Patent Application Ser. No. 62/711,036, filed on Jul. 27,2018, the entirety of which are incorporated by reference herein.

BACKGROUND OF THE INVENTION Field of the Invention

The application relates in general to a driving module, and inparticular, to a driving module which is used to hold and move anoptical element.

Description of the Related Art

As technology has advanced, a lot of electronic devices (for example,tablet computers and smartphones) have incorporated the functionality oftaking photographs and recording video. These electronic devices havebecome more commonplace, and have been developed to be more convenientand thin. More and more options are provided for users to choose from.

Since the space inside the camera module is limited, the components areusually adhered to each other by glue to prevent deformation and damagesduring assembly of the camera module, so that the reliability of theproducts can be increased. However, a large number of glue applicationstations are often required because a large number of components need tobe assembled, thus leading to increase of assembly time and productioncost.

Additionally, because the components inside a camera module have smalldimensions, it is difficult to rapidly and precisely apply glue in thecorrect positions between the components by manual labor. Therefore,conventional camera modules usually have problems with low productionyield and high production costs.

BRIEF SUMMARY OF INVENTION

In view of the aforementioned problems, the object of the invention isto provide an optical element driving module that includes a fixedportion, a movable portion, a driving assembly, and at least a glue. Thefixed portion includes a housing and a base. The movable portion ismovable relative to the fixed portion, and the driving assembly includesat least a coil and at least a magnetic element for driving the movableportion to move relative to the fixed portion. Specifically, thehousing, the base, and the magnetic element are adhered to each other bythe glue.

Another object of the invention is to provide an optical element drivingmechanism that includes a base, a holder, a casing, a frame, a drivingassembly, and an adhering member. The holder is movably connected to thebase, the holder is configured to hold an optical element, and theoptical element defines an optical axis. The casing has a top wall and aplurality of side walls extending from the edge of the top wall alongthe optical axis, and the top wall is closer to a light-incident endthan the base. The frame is disposed on the top wall and has a frameprotrusion extending toward the base. The driving assembly is configuredto drive the holder to move relative to the base, and an accommodatingspace is formed between the base, the frame and the casing. The adheringmember is disposed in the accommodating space and configured to directlyadhere to the base, the frame, the casing, and the driving assembly.

BRIEF DESCRIPTION OF DRAWINGS

The invention can be more fully understood by reading the subsequentdetailed description and examples with references made to theaccompanying drawings, wherein:

FIG. 1-1 is an exploded diagram showing an optical element drivingmodule 1-1 according to an embodiment of the invention.

FIG. 1-2 is a perspective diagram of the optical element driving module1-1 in FIG. 1 after assembly.

FIG. 1-3 is a perspective diagram of the optical element driving module1-1 with the housing 1-10 and the glues 1-70 omitted therefrom.

FIG. 1-4 is a top view of the optical element driving module 1-1 of FIG.1-2 with the base 1-20, the second resilient member 1-40 and the glues1-70 omitted therefrom.

FIG. 1-5 is a perspective diagram of the mechanism of FIG. 1-3 with theglues 1-70 applied thereto.

FIG. 1-6 is a top view of the mechanism of FIG. 1-4 with the glues 1-70applied thereto.

FIG. 1-7 is a cross-sectional view taken along line X1-X1 in FIG. 1-2 .

FIG. 1-8 is a perspective diagram showing an optical element drivingmodule 1-1 according to another embodiment of the invention.

FIG. 1-9 is a perspective diagram of the optical element driving module1-1 of FIG. 1-8 with the housing 1-10 and one of the glues 1-70 omittedtherefrom.

FIG. 1-10 is a cross-sectional view taken along line X2-X2 in FIG. 1-8 .

FIG. 1-11 is a perspective diagram showing an optical element drivingmodule 1-1 according to another embodiment of the invention.

FIG. 1-12 is a perspective diagram of the optical element driving module1-1 of FIG. 1-11 with the housing 1-10 omitted therefrom.

FIG. 1-13 is a side view of an optical element driving module 1-1 withthe housing 1-10 omitted therefrom, according to another embodiment ofthe invention.

FIG. 1-14 , shows a holder 1-50 and two oval coils 1-52 disposed on theholder 1-50 according to another embodiment of an optical elementdriving module 1-1.

FIG. 2-1 shows a schematic diagram of an optical element drivingmechanism 2-100 according to an embodiment of the present disclosure.

FIG. 2-2 shows an exploded diagram of the optical element drivingmechanism 2-100 according to the embodiment of the present disclosure.

FIG. 2-3 shows a cross-sectional view along line A-A′ in FIG. 2-1according to the embodiment of the present disclosure.

FIG. 2-4 is a schematic diagram showing a partial structure of theoptical element driving mechanism 2-100 according to an embodiment ofthe present disclosure.

FIG. 2-5 is a cross-sectional view along line B-B′ in FIG. 2-1 accordingto an embodiment of the present disclosure.

FIG. 2-6 is a partial structural diagram of the frame 2-104 and thefirst magnet 2-M11 according to an embodiment of the present disclosure.

FIG. 2-7 is a partial structural diagram of the base 2-112 according tosome embodiments of the present disclosure.

FIG. 2-8 is a cross-sectional view of the optical element drivingmechanism 2-100 according to another embodiment of the presentdisclosure.

FIG. 2-9 is a partial structural diagram of the frame 2-104, the base2-112, and the second elastic member 2-110 according to an embodiment ofthe present disclosure.

FIG. 2-10 is a partial structural diagram of an optical element drivingmechanism 2-100′ according to another embodiment of the presentdisclosure.

FIG. 2-11 is a cross-sectional view along line C-C′ in FIG. 2-1according to an embodiment of the present disclosure.

FIG. 2-12 is a schematic diagram of a frame 2-104A and a first elasticmember 2-106 of an optical element driving mechanism 2-100A according toanother embodiment of the present disclosure.

FIG. 2-13 is a schematic diagram of the frame 2-104A, a first elasticmember 2-2-106 and the holder 2-108 according to another embodiment ofthe present disclosure.

FIG. 2-14 is a cross-sectional view of the optical element drivingmechanism 2-100A according to another embodiment of the presentdisclosure.

FIG. 2-15 is a partial cross-sectional view of an optical elementdriving mechanism 2-100B according to another embodiment of the presentdisclosure.

FIG. 2-16 is a cross-sectional view of the optical element drivingmechanism 2-100 along line D-D′ in FIG. 2-1 according to an embodimentof the present disclosure.

DETAILED DESCRIPTION OF INVENTION

The making and using of the embodiments of the optical element drivingmodule are discussed in detail below. It should be appreciated, however,that the embodiments provide many applicable inventive concepts that canbe embodied in a wide variety of specific contexts. The specificembodiments discussed are merely illustrative of specific ways to makeand use the embodiments, and do not limit the scope of the disclosure.

Unless defined otherwise, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which this invention belongs. It should be appreciated thateach term, which is defined in a commonly used dictionary, should beinterpreted as having a meaning conforming to the relative skills andthe background or the context of the present disclosure, and should notbe interpreted in an idealized or overly formal manner unless definedotherwise.

In the following detailed description of the preferred embodiments,reference is made to the accompanying drawings, and in which specificembodiments of which the invention may be practiced are shown by way ofillustration. In this regard, directional terminology, such as “top,”“bottom,” “left,” “right,” “front,” “back,” etc., is used with referenceto the orientation of the figures being described. The components of thepresent invention can be positioned in a number of differentorientations. As such, the directional terminology is used for thepurposes of illustration and is in no way limiting.

Embodiments of Group I

FIG. 1-1 is an exploded diagram showing an optical element drivingmodule 1-1 according to an embodiment of the invention, and FIG. 1-2 isa perspective diagram of the optical element driving module 1-1 in FIG.1-1 after assembly. Here, the optical element driving module 1-1 has arectangular structure and primarily comprises a housing 1-10, a base1-20, a first resilient member 1-30, a second resilient member 1-40, aholder 1-50, a coil 1-52, at least a magnetic element 1-62 (e.g.magnet), and a glue 1-70. The holder 1-50 has an opening 1-51, and anoptical element (not shown) can be disposed in the opening 1-51.

In this embodiment, the holder 1-50 constitute a movable portion of theoptical element driving module 1-1 for holding the optical element (e.g.optical lens). The housing 1-10 and the base 1-20 constitute a fixedportion of the optical element driving module 1-1, wherein the first andsecond resilient members 1-30 and 1-40 movably connect the movableportion to the fixed portion. Additionally, at least one of the magnets1-60 and the coil 1-52 on the holder 1-50 constitute a driving assembly1-56. When an electrical current is applied to the coil 1-52, the magnet1-60 and the coil 1-52 can produce an electromagnetic force driving themovable portion to move relative to the fixed portion.

As shown in FIGS. 1-1 and 1-2 , the housing 1-10 has a top cover 1-12,an opening 1-13, and at least a sidewall 1-14. In this embodiment, thetop cover 1-12 forms four through holes 1-121 (FIG. 1-2 ) located at thefour corners thereof, wherein the through holes 1-121 are extendedthrough the top cover 1-12 along the optical axis 1-O of the opticalelement (Z direction). Moreover, the opening 1-13 is extended throughthe top cover 1-12 along the optical axis 1-O of the optical element (Zdirection), and the diameter of the opening 1-13 is greater than thediameter of the through holes 1-121. The sidewalls 1-14 are extendedfrom the edges of the top cover 1-12 toward the base 1-20 along theoptical axis 1-O (Z direction), and the sidewalls 1-14 and the base 1-20are connected to each other. Specifically, the housing 1-10 further hasan inner surface 1-141 (FIG. 1-1 ) surrounding the holder 1-50 andparallel to the optical axis 1-O (Z direction).

The base 1-20 comprises a main body 1-21, a plurality of protrusions1-22 and an opening 1-H, wherein the opening 1-H is extended through themain body 1-21 along the optical axis 1-O (Z direction). The protrusions1-22 are respectively disposed at the four corners of the main body 1-21and extend toward the top cover 1-12 of the housing 1-10. As shown inFIG. 1-1 , each of the protrusions 1-22 forms two lateral surfaces 1-23perpendicular to each other. The lateral surfaces 1-23 face the innersurface 1-141 of the housing 1-10, and each protrusion 1-22 forms alongitudinal recess 1-221 between two adjacent lateral surfaces 1-23,wherein the recess 1-221 extends along the optical axis 1-O (Zdirection). Here, the recesses 1-221 are located correspond to thethrough holes 1-121 of the housing 1-10, so that several glues 1-70 canbe applied into the spaces between the lateral surfaces 1-23 of theprotrusions 1-22 and the inner surface 1-141 of the housing 1-10 via thethrough holes 1-121, and the housing 1-10 and the base 1-20 cantherefore be firmly connected to each other.

FIG. 1-3 is a perspective diagram of the optical element driving module1-1 with the housing 1-10 and the glues 1-70 omitted therefrom, and FIG.1-4 is a top view of the optical element driving module 1-1 of FIG. 1-2with the base 1-20, the second resilient member 1-40 and the glues 1-70omitted therefrom. Referring to FIGS. 1-1 to 1-4 , the optical axis 1-Oof the optical element passes through the opening 1-13 of the housing1-10, the opening 1-51 of the holder 1-50, and an opening 1-H of thebase 1-20. In this embodiment, the optical element (such as a lens) canreceive and guide light to sequentially propagate through the opening1-13 of the housing 1-10, the opening 1-51 of the holder 1-50, and theopening 1-H of the base 1-20 to an image sensor (not shown).

FIG. 1-5 is a perspective diagram of the mechanism of FIG. 1-3 with theglues 1-70 applied thereto, FIG. 1-6 is a top view of the mechanism ofFIG. 1-4 with the glues 1-70 applied thereto, and FIG. 1-7 is across-sectional view taken along line XI-XI in FIG. 1-2 . As shown inFIG. 1-7 , the first resilient member 1-30 is located between the topcover 1-12 of the housing 1-10 and the holder 1-50, and it connects thetop surfaces of the protrusions 1-22 and the holder 1-50. The firstresilient member 1-30 in FIG. 1-7 has a first surface 1-32 (lowersurface) perpendicular to the Z axis, not parallel to the inner surface1-141 of the housing 1-10.

Referring to FIGS. 1-1 and 1-7 , the second resilient members 1-40 arelocated between the holder 1-50 and the main body 1-21 of the base 1-20,and they connect the bottom surface of the holder 1-50 and the topsurface of the main body 1-21. In this embodiment, the second resilientmembers 1-40 are electrically connected to the metal circuits embeddedin the base 1-20. It should be noted that the second resilient member1-40 in FIG. 1-7 has a second surface 1-42 on the top side thereof,perpendicular to the optical axis 1-O (Z direction) and facing the firstsurface 1-32 of the first resilient member 1-30.

As mentioned above, the driving assembly 1-56 comprises at least amagnetic element 1-62 and a coil 1-52. In this embodiment, the drivingassembly 1-56 comprises four magnetic elements 1-62 and one coil 1-52.The magnetic elements 1-62 are disposed on the four sides of the base1-20 and located above the top surface of the main body 1-21, whereineach magnetic element 1-62 is positioned between two adjacentprotrusions 1-22. Moreover, each magnetic element 1-62 has a connectionsurface 1-621 (FIG. 1-4 ) in contact with the glue 1-70, wherein theconnection surface 1-621 is perpendicular to the inner surface 1-141 ofthe housing 1-10.

The coil 1-52 is disposed around the holder 1-50 and locatedcorresponding to the magnetic elements 1-62. In this embodiment, thecoil 1-52 is electrically connected to the second resilient member 1-40,whereby the metal circuit inside the base 1-20 can receive and transferan external electrical current to the coil 1-52 via the second resilientmember 1-40. Therefore, the coil 1-52 and the magnetic elements 1-62 canproduce an electromagnetic force driving the holder 1-50 to moverelative to the fixed portion along the optical axis 1-O (Z direction),so as to achieve auto-focusing of the optical element driving module 1-1and improve the quality of the images captured by the image sensor.

Referring to FIGS. 1-5 to 1-7 , four L-shaped spaces are formed betweenthe first resilient member 1-30, the inner surface 1-141 of the housing1-10, and the four protrusions 1-22 of the base 1-20 for accommodatingthe glues 1-70. Specifically, the L-shaped spaces are communicated withthrough holes 1-121 of the housing 1-10, and each of the glues 1-70forms an L-shaped structure after solidification, as shown in FIG. 1-1 .

During assembly of the optical element driving module 1-1, the glues1-70 can be applied into the spaces via the through holes 1-121 of thehousing 1-10. The protrusions 1-22 of the base 1-20 can guide the glues1-70 to efficiently flow into the spaces, so that the glues 1-70 are incontact with the inner surface 1-141 of the housing 1-10, the lateralsurfaces 1-23 of the protrusions 1-22, the first surface 1-32 of thefirst resilient member 1-30, the second surface 1-42 of the secondresilient member 1-40, and the connection surfaces 1-621 of the magneticelements 1-62. In some embodiments, however, the optical element drivingmodule 1-1 may comprise only one resilient member (either the firstresilient member 1-30 or the second resilient member 1-40).

In this embodiment, with the through holes 1-121 formed on the housing1-10 and communicated with the spaces inside the optical element drivingmodule 1-1, the glues 1-70 can be directly injected into the spaces viathe through holes 1-121, thereby adhering the housing 1-10, the base1-20, the first and second resilient members 1-30 and 1-40, and themagnetic elements 1-62 to each other. Therefore, the components insidethe optical element driving module 1-1 can be rapidly positioned, so asto improve the efficiency of manual assembly. Moreover, the number ofglue application stations can also be reduced to save production costand enhance manufacturing efficiency of the optical element drivingmodule 1-1.

FIG. 1-8 is a perspective diagram showing an optical element drivingmodule 1-1 according to another embodiment of the invention, FIG. 1-9 isa perspective diagram of the optical element driving module 1-1 of FIG.1-8 with the housing 1-10 and one of the glues 1-70 omitted therefrom,and FIG. 1-10 is a cross-sectional view taken along line X2-X2 in FIG.1-8 . Different from FIGS. 1-1 to 1-7 , the base 1-20 in the embodimentof FIGS. 1-8 to 1-10 forms four through holes 1-24 at the corners of themain body 1-21, wherein the through holes 1-24 are aligned to therecesses 1-221 of the protrusions 1-22 and communicated with the spacesinside the optical element driving module 1-1 for applying the glues1-70.

It should be noted that several metal circuits 1-26 are embedded in thebase 1-20, wherein the ends of the metal circuits 1-26 are exposed tothe top surfaces of the protrusions 1-22 to electrically contact thefirst resilient member 1-30 (FIG. 1-9 ). Thus, the metal circuits 1-26can be electrically connected to the coil 1-52 via the first resilientmember 1-30. Owing to the through holes 1-24 formed on the base 1-20 andthe first resilient member 1-30 electrically connecting the metalcircuits 1-26 to the coil 1-52, the through holes 1-121 on the housing1-10 and the second resilient member and 1-40 may be omitted from theoptical element driving module 1-1, whereby the production cost and thenumber of assembly stations can be reduced, and miniaturization of theoptical element driving module 1-1 can also be achieved.

During assembly of the optical element driving module 1-1, an assemblyoperator may apply the glues 1-70 to the spaces inside the base 1-20 viathe through holes 1-24. Hence, the housing 1-10, the base 1-20, thefirst resilient member 1-30, and the magnetic element 1-62 can beadhered to each other at the same time, so as to enhance the efficiencyof manual assembly.

FIG. 1-11 is a perspective diagram showing an optical element drivingmodule 1 according to another embodiment of the invention, FIG. 1-12 isa perspective diagram of the optical element driving module 1-1 of FIG.1-11 with the housing 1-10 omitted therefrom. Different from FIGS. 1-1to 1-7 , the optical element driving module 1-1 in FIGS. 1-11 to 1-12comprises only two magnetic elements 1-62 respectively on two oppositesides of the base 1-20 (only one magnetic element 1-62 is shown in FIG.1-12 ). Additionally, the optical element driving module 1 furthercomprises a circuit board 1-80 located between the two magnetic elements1-62, wherein the circuit board 1-80 and the two magnetic elements 1-62are situated on different sides of the base 1-20. Here, the circuitboard 1-80 is electrically connected to the second resilient member 1-40below the holder 1-50.

In the optical element driving module 1-1 of FIGS. 1-11 to 1-12 , theglues 1-70 can be applied directly to the spaces inside the housing 1-10via the through holes 1-121. Hence, the housing 1-10, the base 1-20, thefirst resilient member 1-30, the second resilient member 1-40, and themagnetic element 1-62 can be adhered to each other at the same time, soas to enhance the efficiency of manual assembly.

FIG. 1-13 is a side view of an optical element driving module 1-1 withthe housing 1-10 omitted therefrom, according to another embodiment ofthe invention. In this embodiment, the spaces for receiving the glues1-70 are extended to the circuit board 1-80 along the X axis. Hence, theglues 1-70 can directly contact the circuit board 1-80 when applied intothe spaces, so that the circuit board 1-80 can be firmly affixed to thebase 1-20 to enhance the assembly efficiency.

In some embodiments, a position-sensing element such as Hall effectsensor (not shown) may be disposed on and electrically connected to thecircuit board 1-80 to detect the movement of the movable portionrelative to the fixed portion. Thus, accurate positioning and rapidresponse time of the optical element driving module 1-1 can be bothachieved.

Referring to FIG. 1-14 , another embodiment of the optical elementdriving module 1-1 comprises two oval coils 1-52 arranged on twoopposite sides of the holder 1-50, wherein the coils 1-52 are locatedcorresponding to two of the magnetic elements 1-62 (FIG. 1-1 ). When anelectrical current is applied to the coils 1-52, the magnetic elements1-62 and the coils 1-52 can produce an electromagnetic force driving theholder 1-50 to move relative to the fixed portion along the optical axis(Z direction), thereby achieving auto-focusing of the optical elementdriving module 1-1 and improving the quality of the images captured bythe image sensor.

In summary, since the glues 1-70 can be applied into the spaces insidethe optical element driving module 1-1, the housing 1-10, the base 1-20,the first resilient member 1-30, the second resilient member 1-40, andthe magnetic element 1-62 can be adhered to each other at the same time.Thus, the number of glue application stations can be reduced to saveproduction cost and enhance manufacturing efficiency of the opticalelement driving module 1-1.

Moreover, by forming the through holes 1-121 on the housing 1-10 orforming the through holes 1-24 on the base 1-20, an assembly operatorcan precisely apply the glues 1-70 to the spaces inside the opticalelement driving module 1-1, and the glues 1-70 can be rapidly guided topredetermined positions between different components inside the opticalelement driving module 1-1, whereby misassembly of the optical elementdriving module 1-1 can be prevented, and the efficiency of manualassembly can be greatly enhanced.

Embodiments of Group II

Please refer to FIG. 2-1 to FIG. 2-3 . FIG. 2-1 shows a schematicdiagram of an optical element driving mechanism 2-100 according to anembodiment of the present disclosure, FIG. 2-2 shows an exploded diagramof the optical element driving mechanism 2-100 according to theembodiment of the present disclosure, and FIG. 2-3 shows across-sectional view along line A-A′ in FIG. 2-1 according to theembodiment of the present disclosure. The optical element drivingmechanism 2-100 can be an optical camera system and can be configured tohold and drive an optical element (not shown in the figures). Theoptical element driving mechanism 2-100 can be installed in variouselectronic devices or portable electronic devices, such as a smartphoneor a tablet computer, for allowing a user to perform the image capturingfunction. In this embodiment, the optical element driving mechanism2-100 can be a voice coil motor (VCM) with an auto-focusing (AF)function, but it is not limited thereto. In other embodiments, theoptical element driving mechanism 2-100 can also perform the functionsof auto-focusing and optical image stabilization (OIS).

As shown in FIG. 2-1 to FIG. 2-3 , in the present embodiment, theoptical element driving mechanism 2-100 mainly includes a fixed assembly(may include a casing 2-102, a frame 2-104 and a base 2-112), a firstelastic member 2-106, a movable assembly (may include a holder 2-108), adriving assembly (may include a first magnet 2-M11, a second magnet2-M12, and a driving coil 2-DCL), a second elastic member 2-110, and acircuit assembly 2-114.

The holder 2-108 can move relative to the fixed assembly, and the holder2-108 is configured to hold the optical element (now shown in thefigures), such as a lens, an optical axis 2-O is defined by the opticalelement. It should be noted that in other embodiments, the members inthe fixed assembly can also be adjusted to be movable (that is, they canbe included in the movable assembly) according to practicalrequirements.

As shown in FIG. 2-2 , the casing 2-102 has a hollow structure, and acasing opening 2-1021 is formed on the casing 2-102. A base opening2-1121 is formed on the base 2-112. The center of the casing opening2-1021 corresponds to the optical axis 2-O of the optical element. Thebase opening 2-1121 corresponds to an image sensing element (now shownin the figures) disposed below the base 2-112. External light can enterthe casing 2-102 through the casing opening 2-1021, and then to bereceived by the image sensing element (not shown) after passing throughthe optical element and the base opening 2-1121, so as to generate adigital image signal.

In addition, the casing 2-102 may include an accommodating space 2-1023for accommodating the frame 2-104, the holder 2-108, the first elasticmember 2-106, the first magnet 2-M11, the second magnet 2-M12, thedriving coil 2-DCL, the circuit assembly 2-114, and so on. In thisembodiment, the circuit assembly 2-114 may be a circuit board which isdisposed on the frame 2-104, and the driving assembly is electricallyconnected to the circuit assembly 2-114 and can drive the holder 2-108to move relative to the fixed assembly (for example, to move relative tothe base 2-112 or the frame 2-104).

In this embodiment, the shape of the first magnet 2-M11 and of thesecond magnet 2-M12 may be a long strip-shaped structure, but the numberof magnets and their shape are not limited to the above. For example,they may be shaped differently in other embodiments. In addition, thefirst magnet 2-M11 or the second magnet 2-M12 can be a multi-polemagnet.

As shown in FIG. 2-2 and FIG. 2-3 , the casing 2-102 has a top wall2-102T and a plurality of side walls 2-102S extending from the edge ofthe top wall 2-102T along the optical axis 2-O, and the top wall 2-102Tis closer to a light-incident end (above the top wall 2-102T in FIG. 2-3) than the base 2-112. The frame 2-104 is fixedly disposed on the topwall 2-102T of the casing 2-102, and the first magnet 2-M11 and thesecond magnet 2-M12 may be also fixedly disposed on the frame 2-104 andon the casing 2-102. In addition, the frame 2-104 has a frame protrusion2-104P that extends toward the base 2-112 (FIG. 2-2 ).

As shown in FIG. 2-2 and FIG. 2-3 , in this embodiment, the driving coil2-DCL can be a winding coil and is disposed surround the holder 2-108.In addition, the driving coil 2-DCL corresponds to the first magnet2-M11 and the second magnet 2-M12. When the driving coil 2-DCL isprovided with electricity, the driving coil 2-DCL acts with the firstmagnet 2-M11 and the second magnet 2-M12 to generate an electromagneticdriving force, to drive the holder 2-108 and the optical element to movealong a direction of the optical axis 2-O (the Z-axis) relative to thebase 2-112.

Furthermore, as shown in FIG. 2-2 and FIG. 2-3 , in this embodiment, theouter portion of the first elastic member 2-106 is fixed to the frame2-104. Similarly, the outer portion of the second elastic member 2-110is fixed to four corners of the base 2-112. In addition, the innerportions of the first elastic member 2-106 and the second elastic member2-110 are respectively connected to the upper side and the lower side ofthe holder 2-108, so that the holder 2-108 can be movably connected tothe frame 2-104 through the first elastic member 2-106 and the secondelastic member 2-110, and therefore the holder 2-108 can be suspended inthe frame 2-104 (as shown in FIG. 2-3 ). Therefore, the driving assemblycan drive the holder 2-108 to move relative to the frame 2-104.

Please refer to FIG. 2-4 and FIG. 2-5 , FIG. 2-4 is a schematic diagramshowing a partial structure of the optical element driving mechanism2-100 according to an embodiment of the present disclosure, and FIG. 2-5is a cross-sectional view along line B-B′ in FIG. 2-1 according to anembodiment of the present disclosure. In this embodiment, as shown inFIG. 2-4 , an accommodating space 2-ADS is formed between the base2-112, the frame 2-104, and the casing 2-102 (illustrated by a brokenline), and the optical element driving mechanism 2-100 may furtherinclude an adhering member 2-AD disposed in the accommodating space2-ADS. The adhering member 2-AD is configured to be directly adhered tothe base 2-112, the frame 2-104, the casing 2-102, and the first magnet2-M11 or the second magnet 2-M12 of the drive assembly. In addition, thefirst elastic member 2-106 is disposed on the frame 2-104, and thesecond elastic member 2-2-110 is disposed on the base 2-112 (FIG. 2-5 ),and the adhering member 2-AD may be also directly adhered to the firstelastic member 2-106 and the second elastic member 2-110.

Specifically, as shown in FIG. 2-5 , the adhering member 2-AD may bedirectly connected to the side walls 2-102S, the base 2-112, and theframe protrusion 2-104P. A single adhering member 2-AD (such as glue)can be used to bond multiple members in the present disclosure, therebyachieving the purpose of miniaturization, improving overall mechanicalstrength and simplifying the manufacturing process at the same time.Furthermore, the position of the adhering member 2-AD can be controlledby the accommodating space 2-ADS formed by the side walls 2-102S, theframe protrusion 2-104P, and the surface of the magnetic element (suchas the second magnet 2-M12) so as to ensure the accuracy of positioningthe adhering member 2-AD.

Please continue to refer to FIG. 2-5 . In this embodiment, the base2-112 further includes a projection 2-1122 extending toward the top wall2-102T of the casing 2-102, and the adhering member 2-AD adheresdirectly to the projection 2-1122. When viewed in a directionperpendicular to the optical axis 2-O, the projection 2-1122 partiallyoverlaps the frame protrusion 2-104P, and the projection 2-1122 isfarther away from the optical axis 2-O than the frame protrusion 2-104P.Based on the design of the projection 2-1122, the position of the frameprotrusion 2-104P can be limited, thereby improving assembly accuracy.That is, the projection 2-1122 can serve as a positioning structure ofthe base 2-112, and the projection 2-122 is disposed between the casing2-102 and the frame 2-104 to improve positioning accuracy.

Specifically, as shown in FIG. 2-5 , the projection 2-1122 may have afirst projection surface 2-PS1 and a second projection surface 2-PS2.The first projection surface 2-PS1 faces the frame protrusion 2-104P,the second projection surface 2-PS2 faces the side wall 2-102S, and theadhering member 2-AD adheres directly to the first projection surface2-PS1 and the second projection surface 2-PS2. Therefore, the adheringmember 2-AD can cover a plurality of surfaces of the projection 2-1122so as to increase the bonding area and improve the overall mechanicalstrength.

Please refer to FIG. 2-6 , which is a partial structural diagram of theframe 2-104 and the first magnet 2-M11 according to an embodiment of thepresent disclosure. As shown in FIG. 2-6 , the frame protrusion 2-104Pof the frame 2-104 has a first protrusion surface 2-FS1 and a secondprotrusion surface 2-FS2, the first protrusion surface 2-FS1 and thesecond protrusion surface 2-FS2 all face the magnetic element (forexample, the first magnet 2-M11) of the driving assembly, and the firstprotrusion surface 2-FS1 and the second protrusion surface 2-FS2 areboth parallel to the optical axis 2-O (the Z-axis). Based on thisstructural design, the first protrusion surface 2-FS1 and the secondprotrusion surface 2-FS2 of the frame protrusion 2-104P can serve aspositioning features to fix the magnetic element and improve positioningaccuracy.

Please refer to FIG. 2-7 , which is a partial structural diagram of thebase 2-112 according to some embodiments of the present disclosure. Asshown in FIG. 2-7 , the projection 2-1122 has a groove 2-112Tcorresponding to the casing 2-102. The groove 2-112T can be used todefine a disposing range of the adhering member 2-AD, so that theadhering member 2-AD can easily contact the groove 2-112T and the casing2-102 so as to improve the accuracy of disposing the adhering member2-AD, thereby improving the assembly convenience, and also increasingthe bonding area and overall strength.

In addition, the base 2-112 has a rectangular structure (FIG. 2-2 ).When the adhering member 2-AD is disposed at the corner of the base2-112, the adhering member 2-AD also flows to one side of the base 2-112(as shown in FIG. 2-1 ) and is configured to adhere to the sidewall2-102S and the base 2-112, so that the overall sealing and strength canbe improved.

Please refer to FIG. 2-7 and FIG. 2-8 together. FIG. 2-8 is across-sectional view of the optical element driving mechanism 2-100according to another embodiment of the present disclosure. As shown inFIG. 2-8 , the projection 2-1122 further has a third projection surface2-PS3 facing the top wall 2-102T. It should be noted that an avoidancestructure 2-RS (for example, a radius or a chamfer) is formed at theboundary between the third projection surface 2-PS3 and the firstprojection surface 2-PS1, and the avoidance structure 2-RS is fartheraway from the frame protrusion 2-104P than the first projection surface2-PSI. Based on the design of the avoidance structure 2-RS, when theoptical element driving mechanism 2-100 is assembled, positioning can beeasily performed, and the risk of debris generated by collision betweenmembers can also be reduced at the same time.

Please refer to FIG. 2-9 , which is a partial structural diagram of theframe 2-104, the base 2-112, and the second elastic member 2-110according to an embodiment of the present disclosure. As shown in FIG.2-9 , the base 2-112 further has a base positioning structure 2-1123extending toward the top wall 2-102T, and the base positioning structure2-1123 passes through the second elastic member 2-110. Thus, when viewedalong a direction perpendicular to the optical axis 2-O (such as alongthe X-axis or the Y-axis), the base positioning structure 2-1123partially overlaps the second elastic member 2-110. Based on the designof the base positioning structure 2-1123, the accuracy of positioningthe second elastic member 2-110 can be increased.

In addition, a recess 2-104C corresponding to the base positioningstructure 2-1123 can be formed on the frame protrusion 2-104P so thatthe recess 2-104C is configured to receive the base positioningstructure 2-1123. Therefore, when viewed in the direction of the opticalaxis 2-O (the Z-axis), the base positioning structure 2-1123 overlapsthe frame protrusion 2-104P. In other embodiments, the base positioningstructure 2-1123 may partially overlap the frame protrusion 2-104P whenviewed in the direction of the optical axis 2-O (the Z-axis). Therefore,the purpose of miniaturization of the optical element driving mechanism2-100 can be further achieved.

Next, please refer to FIG. 2-10 , which is a partial structural diagramof an optical element driving mechanism 2-100′ according to anotherembodiment of the present disclosure. In this embodiment, the circuitassembly 2-114 includes a body 2-1141 and a plurality of metal lines2-1143. A portion of the metal lines 2-1143 is disposed within the body2-1141 and another portion is exposed outside the body 2-1141. Theoptical element driving mechanism 2-100′ may further include a positionsensing component 2-116 and a filter 2-118 disposed on the body 2-1141.The position sensing component 2-116 is configured to sense the motionof the holder 2-108 relative to the base 2-112, and the filter 2-118 isconfigured to filter the electrical signals entering the positionsensing component 2-116.

As shown in FIG. 2-10 , the adhering member 2-AD adheres directly to thecircuit assembly 2-114, the base 2-112, and the frame 2-104. The purposeof miniaturization can be achieved, the overall mechanical strength canbe improved, and the manufacturing process can be simplified at the sametime by adhering the circuit assembly 2-114 with other components at thesame time. Furthermore, the adhering member 2-AD also adheres directlyto the metal lines 2-1143 to avoid a short circuit of the metal lines2-1143. That is, the adhering member 2-AD of the present disclosure canalso serve as an insulating material.

In addition, as shown in FIG. 2-10 , at a processing position 2-PP, theexposed metal line 2-1143 may be connected to the second elastic member2-110 by soldering so that the circuit assembly 2-114 is electricallyconnected to the second elastic member 2-110. As a result, the secondelastic member 2-110 is electrically connected to an external circuit(for example, a circuit board) through the circuit assembly 2-114.

Please refer to FIG. 2-11 , which is a cross-sectional view along lineC-C′ in FIG. 2-1 according to an embodiment of the present disclosure.As shown in FIG. 2-11 , the circuit assembly 2-114 has a surface 2-1145,and the surface 2-1145 is closer to the holder 2-108 than the positionsensing component 2-116. That is, the body 2-1141 of the circuitassembly 2-114 can protect the position sensing component 2-116 fromcolliding with other components and being damaged).

Referring to FIG. 2-12 and FIG. 2-13 . FIG. 2-12 is a schematic diagramof a frame 2-104A and a first elastic member 2-106 of an optical elementdriving mechanism 2-100A according to another embodiment of the presentdisclosure, and FIG. 2-13 is a schematic diagram of the frame 2-104A, afirst elastic member 2-106, and the holder 2-108 according to anotherembodiment of the present disclosure. As shown in FIG. 2-13 , theoptical element driving mechanism 2-100A may further include a shockabsorbing member 2-BM disposed on the frame protrusion 2-104P and theholder 2-108 (or the shock absorbing member 2-BM may be directly incontact with the driving coil 2-DCL).

Specifically, the frame protrusion 2-104P has an accommodating structure2-104R corresponding to the holder 2-108, and the accommodatingstructure 2-104R is configured to accommodate one end of the shockabsorbing member 2-BM, so that the shock absorbing member 2-BM can beeasily positioned. Because the shock absorbing member 2-BM is disposedbetween the fixed assembly and the movable assembly, so that unnecessaryvibration can be suppressed, and the movable assembly can quickly reacha stable state after operation.

In addition, please refer to FIG. 2-12 and FIG. 2-14 at the same time.FIG. 2-14 is a cross-sectional view of the optical element drivingmechanism 2-100A according to another embodiment of the presentdisclosure. In this embodiment, a positioning structure 2-104S can beformed on a bottom surface 2-1041 of the frame protrusion 2-104P thepositioning structure 2-104S extends in the direction of the opticalaxis 2-O, and the second elastic member 2-110 is disposed on the bottomsurface 2-1041. When viewed in a direction perpendicular to the opticalaxis 2-O, as shown in FIG. 2-14 , the positioning structure 2-104Spartially overlaps the second elastic member 2-110. Based on the designof the positioning structure 2-104S the assembly accuracy of the secondelastic member 2-110 can be improved.

Further, as shown in FIG. 2-14 , the base 2-112 has an avoidance groove2-1125 corresponding to the positioning structure 2-104S, and whenviewed in a direction perpendicular to the optical axis 2-O, theavoidance groove 2-1125 partially overlaps the positioning structure2-104S. Based on this structural design, the base 2-112 can be preventedfrom colliding with the frame protrusion 2-104P, and the purpose ofminiaturization can be achieved.

Further, the adhering member 2-AD is farther away from the optical axis2-O than the frame protrusion 2-104P. As shown in FIG. 2-14 , the frameprotrusion 2-104P can serve as a blocking wall to prevent the adheringmember 2-AD from entering the inside of the frame 2-104A to contact theholder 2-108, causing malfunction of the optical element drivingmechanism 2-100A.

Please refer to FIG. 2-15 , which is a partial cross-sectional view ofan optical element driving mechanism 2-100B according to anotherembodiment of the present disclosure. In this embodiment, the base 2-112further has a positioning structure 2-1126. A shock absorbing member2-BM is disposed between the positioning structure 2-1126 and the holder2-108. The shock absorbing member 2-BM can be directly in contact withthe driving coil 2-DCL or the holder 2-108. Based on the design of theshock absorbing member 2-BM, unnecessary vibration can be suppressed,and the holder 2-108 can quickly reach a stable state after operation.

Furthermore, as shown in FIG. 2-15 , the frame protrusion 2-104P iscloser to the side wall 2-102S than the positioning structure 2-1126, soas to prevent the shock absorbing member 2-BM from being in contact withthe side wall 2-102S. Furthermore, a groove 2-104C may also be formed onthe frame protrusion 2-104P, and the positioning structure 2-1126 may bedisposed within the groove 2-104C. When viewed in the direction of theoptical axis 2-O the frame protrusion 2-104P overlaps the positioningstructure 2-1126. In other embodiments, the frame protrusions 2-104P mayalso partially overlap the positioning structure 2-1126.

Please refer to FIG. 2-16 , which is a cross-sectional view of theoptical element driving mechanism 2-100 along line D-D′ in FIG. 2-1according to an embodiment of the present disclosure. In thisembodiment, the top wall 2-102T further has an anti-twist structure2-102W extending along the optical axis 2-O, and a twist-proof recess2-108C corresponding to the anti-twist structure 2-102W is formed on theholder 2-108. In addition, the optical element driving mechanism 2-100further includes a shock absorbing member 2-BM disposed on theanti-twist structure 2-102W and the twist-proof recess 2-108C of theholder 2-108. In some embodiments, the shock absorbing member 2-BM is aresilient gel, so that the shock absorbing member 2-BM is disposedbetween the anti-twist structure 2-102W and the holder 2-108 to suppressunnecessary vibration, and therefore the holder 2-108 can quickly reacha stable state after operation.

Although some embodiments of the present disclosure and their advantageshave been described in detail, it should be understood that variouschanges, substitutions and alterations can be made herein withoutdeparting from the spirit and scope of the disclosure as defined by theappended claims. For example, it will be readily understood by thoseskilled in the art that many of the features, functions, processes, andmaterials described herein may be varied while remaining within thescope of the present disclosure. Moreover, the scope of the presentapplication is not intended to be limited to the particular embodimentsof the process, machine, manufacture, compositions of matter, means,methods and steps described in the specification. As one of ordinaryskill in the art will readily appreciate from the disclosure of thepresent disclosure, processes, machines, manufacture, compositions ofmatter, means, methods, or steps, presently existing or later to bedeveloped, that perform substantially the same function or achievesubstantially the same result as the corresponding embodiments describedherein may be utilized according to the present disclosure. Accordingly,the appended claims are intended to include within their scope suchprocesses, machines, manufacture, compositions of matter, means,methods, or steps. Moreover, the scope of the appended claims should beaccorded the broadest interpretation so as to encompass all suchmodifications and similar arrangements.

While the invention has been described by way of example and in terms ofpreferred embodiment, it should be understood that the invention is notlimited thereto. On the contrary, it is intended to cover variousmodifications and similar arrangements (as would be apparent to thoseskilled in the art). Therefore, the scope of the appended claims shouldbe accorded the broadest interpretation to encompass all suchmodifications and similar arrangements.

What is claimed is:
 1. An optical element driving mechanism, comprising:a holder, configured to be connected to an optical element; a casing,having a top wall and a side wall, wherein the top wall having aplate-shaped structure is not parallel to the side wall having aplate-shaped structure; a driving assembly, configured to drive theholder to move relative to the casing; and wherein the top wall has ananti-twist structure extending toward the holder, a twist-proof recesscorresponding to the anti-twist structure is formed on the holder, andthe optical element driving mechanism further includes a first shockabsorbing member directly contacting the anti-twist structure and thetwist-proof recess.
 2. The optical element driving mechanism as claimedin claim 1, wherein the optical element driving mechanism furtherincludes: a base, wherein the holder is movably connected to the base; aframe, disposed on the top wall and having a frame protrusion extendingtoward the base, wherein an accommodating space is formed between thebase, the frame and the casing; and an adhering member, disposed in theaccommodating space and configured to directly adhere to the base, theframe, the casing, and the driving assembly; wherein the adhering memberadheres directly to the side wall and the frame protrusion.
 3. Theoptical element driving mechanism as claimed in claim 2, wherein theadhering member is farther away from an optical axis of the opticalelement than the frame protrusion.
 4. The optical element drivingmechanism as claimed in claim 2, wherein the frame protrusion has afirst protrusion surface and a second protrusion surface, both the firstprotrusion surface and the second protrusion surface face the drivingassembly, and both the first protrusion surface and the secondprotrusion surface are parallel to an optical axis of the opticalelement.
 5. The optical element driving mechanism as claimed in claim 2,wherein the base further includes a projection extending toward the topwall of the casing, and the adhering member adheres directly to theprojection, wherein when viewed in a direction perpendicular to anoptical axis of the optical element, the projection partially overlapsthe frame protrusion.
 6. The optical element driving mechanism asclaimed in claim 5, wherein the projection is farther away from theoptical axis than the frame protrusion.
 7. The optical element drivingmechanism as claimed in claim 6, wherein the projection includes: afirst projection surface, facing the frame protrusion; and a secondprojection surface, facing the side wall, wherein the adhering memberadheres directly to the first projection surface and the secondprojection surface.
 8. The optical element driving mechanism as claimedin claim 7, wherein the projection has a groove corresponding to thecasing.
 9. The optical element driving mechanism as claimed in claim 7,wherein the projection further has a third projection surface facing thetop wall, an avoidance structure is formed at a boundary between thethird projection surface and the first projection surface, and theavoidance structure is farther away from the frame protrusion than thefirst projection surface.
 10. The optical element driving mechanism asclaimed in claim 2, wherein the base has a rectangular structure, theadhering member is disposed at a corner of the base, and the adheringmember is further disposed on a side of the base and is configured toadhere to the sidewall and the base.
 11. The optical element drivingmechanism as claimed in claim 2, wherein the optical element drivingmechanism further comprises: a circuit assembly, disposed on the frame,wherein the adhering member adheres directly to the circuit assembly;and a position sensing component, disposed on the circuit assembly andconfigured to sense motion of the holder relative to the base; whereinthe circuit assembly has a surface, and the surface is closer to theholder than the position sensing component.
 12. The optical elementdriving mechanism as claimed in claim 11, wherein the circuit assemblyincludes a body and a metal line, a portion of the metal line is exposedoutside the body, and the adhering member adheres directly to the metalline.
 13. The optical element driving mechanism as claimed in claim 2,wherein the base further has a base positioning structure extendingtoward the top wall, and when viewed in a direction perpendicular to anoptical axis of the optical element, the base positioning structurepartially overlaps a second elastic member.
 14. The optical elementdriving mechanism as claimed in claim 13, wherein when viewed in adirection of the optical axis, the base positioning structure partiallyoverlaps the frame protrusion.
 15. The optical element driving mechanismas claimed in claim 13, wherein a recess is formed on the frameprotrusion and is configured to receive the base positioning structure.16. The optical element driving mechanism as claimed in claim 15,wherein the frame protrusion is not in contact with the base positioningstructure and the base.
 17. The optical element driving mechanism asclaimed in claim 2, wherein the frame protrusion has an accommodatingstructure corresponding to the holder, and the optical element drivingmechanism further comprises a second shock absorbing member disposedbetween the accommodating structure and the holder.
 18. The opticalelement driving mechanism as claimed in claim 17, wherein the frameprotrusion has a positioning structure extending in a direction of anoptical axis of the optical element, and when viewed in a directionperpendicular to the optical axis, the positioning structure partiallyoverlaps a second elastic member.
 19. The optical element drivingmechanism as claimed in claim 18, wherein the base has an avoidancegroove corresponding to the positioning structure, and when viewed in adirection perpendicular to the optical axis, the avoidance groovepartially overlaps the positioning structure.
 20. The optical elementdriving mechanism as claimed in claim 17, wherein the second shockabsorbing member is directly in contact with the driving assembly.